[Cryptography] Komitments

[Kristian Gjøsteen]

18. des. 2018 kl. 18:06 skrev Phillip Hallam-Baker <phill at hallambaker.com>:
> r = random (128)
> witness= Base32t ( SHA-2-512 (s + r)) 
> […]
> I am sure this has been done before, just didn't see it in the books I looked at. Is there an obvious flaw?

This is a standard construction (see Wikipedia). It can be proven secure, even under quite weak assumptions.

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Kristian Gjøsteen